746 GASTROPODA. [Pulntouata . 



periphery sharply angled, base convex, a little depressed in the centre. 

 Suture not much impressed, simple. Aperture oblique, transverse, 

 lunate. Peristome thin and sharp. Outer lip angled. Columella sub- 

 vertical, short, arcuate. Inner Up reflexed above and almost com- 

 pletely closing the very narrow perforation. 



Diameter, 3-2 mm. ; height, 2 mm. 



Animal unknown. 



Type in my collection. 



Hob. Waitakerei Range (H. S.). 



12. Laoma sublucida, Suter, 1896. Plate 29, fig. !4. 

 Laoma (Phrixgnalhus) sublucida, Suter, P. Mai. S., ii, 1896, 37. 



Shell very small, depressed turbinate, subperforate, corneous, 

 glossy, semitransparent, smooth, periphery rounded or very lightly 

 angled. There is no sculpture, except fine oblique growth-lines. 

 Colour corneous, very often with faint radiate rufous streaks, extend- 

 ing to the umbilicus. Spire conoidal, its height 1^ times that of the 

 aperture ; outlines convex. Protoconch of H turns, blunt. Whorls 

 5, regularly increasing, flatly rounded ; periphery convex or lightly 

 angled, base flatly rounded. Suture impressed. Aperture transverse, 

 lunate. Peristome straight, acute, slightly callous within. Outer and 

 basal lips regularly arched. Columella very short, oblique. Inner lip 

 callous, reflexed, and partly covering the very narrow pervious per- 

 foration, quite open in young specimens. 



Diameter Maj., 3 mm. ; min., 2-75 mm. : height, 2 mm. 



Animal unknown. 



Type in my collection. 



Hob. Waitakerei Range (Cheeseman, H. S.). 



13. Laoma viridula, Suter, 1909. Plate 29, fig. 15. 



Laoma (Phrixgnathus) viridula, Sut., P. Mai. S., viii, 1909, 263, pi. 11, f. 29. 



Shell minute, depressed globose, subperforate, corneous, very thin, 

 translucent, lightly shining, smooth. Sculpture microscopic ; the post- 

 nuclear whorls with fine oblique growth-striae, reticulated by distinct 

 fine spiral lines. Colour corneous, with a greenish hue. Spire de- 

 pressed conoidal, its height a little less than that of the aperture ; 

 outlines almost straight. Protoconch of 1J convex whorls, smooth. 

 Whorls 4, regularly increasing, convex ; periphery rounded, lightly 

 subangled ; base convex, impressed at the middle. Suture rather 

 deep. Aperture oblique, broadly rotundly lunate. Peristome simple, 

 sharp and thin, regularly arched. Columella short, arcuate. Inner 

 l/l> reflexed above, and almost completely closing the narrow per- 

 foration. 



Diameter Maj., 2-5 mm. ; min., 2-3 mm. : height, 1-7 mm. 



Animal unknown. 



Type in my collection. 



Hab. South Island : Capleston, near Ileefton (Cavell). 



